From gperez@inria.fr Wed Oct 16 07:32:59 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!inria!gperez From: gperez@inria.fr (Graham Pérez) Newsgroups: comp.sys.m68k Subject: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Oct16.073259.9381@inria.fr> Date: Wed, 16 Oct 1996 07:32:59 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: Netscape 1.1N Lines: 11 Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. When the carrier locks, the program flashes the Amiga power LED to indicate binary frame synchronization! Long live the Amiga. Try doing real-time subcarrier demodulation on a 386 running Windows 3.1 without dropping frames! -- Graham Pérez | gperez@inria.fr PGP Key fingerprint: A9C3 7CC9 6DEC 70CB "Keep the channels open." From mpetrov@earthlink.net Fri Oct 18 01:30:59 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!earthlink!mpetrov From: mpetrov@earthlink.net (Mei Petrov) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Oct18.013059.1103@earthlink.net> Date: Fri, 18 Oct 1996 01:30:59 GMT References: <1996Oct16.073259.9381@inria.fr> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: NewsWatcher 2.0b24 Lines: 12 In article <1996Oct16.073259.9381@inria.fr>, gperez@inria.fr (Graham Pérez) writes: > Wrote an Amiga assembly program that uses Paula's DMA audio channels to sample and track the Stardust subcarrier. > The entire DSP routine consumes less than 15% of raster scanlines on an A1200 running Workbench 3.1. Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. Top-posters will be placed in my ~/.killfile without notice. -- === Mei Petrov === Dept of Electrical Engineering, EarthLink Network "Extraordinary claims require extraordinary spectra." From kdubois@kth.se Sat Oct 19 15:20:59 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!kth!kdubois From: kdubois@kth.se (Kirsty Dubois) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Oct19.152059.6925@kth.se> Date: Sat, 19 Oct 1996 15:20:59 GMT References: <1996Oct16.073259.9381@inria.fr> <1996Oct18.013059.1103@earthlink.net> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Oct18.013059.1103@earthlink.net>, mpetrov@earthlink.net (Mei Petrov) writes: > Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. > Top-posters will be placed in my ~/.killfile without notice. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- Kirsty Dubois Opinions expressed are solely my own and not those of Royal Institute of Technology, Stockholm. ------------------------------------------------------------ From dduarte@panix.com Sun Oct 20 11:17:59 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!panix!dduarte From: dduarte@panix.com (Dmitri Duarte) Newsgroups: comp.sys.m68k Subject: Re: Question: Real-time 14.2 Hz demodulation on Amiga Paula audio DMA Message-ID: <1996Oct20.111759.4185@panix.com> Date: Sun, 20 Oct 1996 11:17:59 GMT References: <1996Oct16.073259.9381@inria.fr> <1996Oct18.013059.1103@earthlink.net> Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1996Oct18.013059.1103@earthlink.net>, mpetrov@earthlink.net (Mei Petrov) writes: > Tested on my A3000 / 25 MHz. Ran smoothly in the background while I was compiling a C program in another window. > Top-posters will be placed in my ~/.killfile without notice. PC users spend $3,000 on Sound Blasters and Pentium chips and still can't do what a $500 Amiga was doing in 1985. -- Dmitri Duarte SupraFAXModem 28.8 @ ISDN 64k bps "Hardware is temporary. The signal survives."